How to get top-level window position relative to root window (i.e. whole screen) using plain ol' xlib (or brand new XCB)?

I am writing a Xlib app where I want the window to be centered. I have used XMoveWindow with (desktopWidth - width) / 2, (desktopHeight - height) / 2 and it is roughly in the right place. However ...

I'd like to access my Ubuntu 16.10 VPS (Contabo) with using a GNOME environment with VNC, however I am still facing some issues that I couldn't solve so far. To install and configure the software I...

It's not clear to me from the documentation http://python-xlib.sourceforge.net/doc/html/python-xlib_toc.html how I could deterministically check whether a given display output (eg: HDMI-1) is exte...

I am trying to capture an image of the screen for use in screencasting. Thus I need a fast solution, and cannot rely on shell programs such as import or xwd. This is the code I have written so fa...

Self resolved It's posted below as an answer. Trying to get what xinput test-xi2 --root prints with python xlib. Using version 1.9 from github: https://github.com/python-xlib/python-xlib event._dat...

i'm trying to send mouse click event using xlib in a ubuntu 12.04, all works when i do the click in the desktop bar icons and works when i do click in the title bar of each window (close, minimize,...

I'm trying to listen to keyboard input (using an X11 event loop) and get scancodes. These scancodes should refer to the physical location of a key, rather than the character it types. The problem i...

I have written an SFML C++ game, and tried to start using threads, but after a while everything crashes. After searching I found out the fix seems to be to call XInitThreads(); but this does not wo...

I am trying to write a program that tracks when the active window changes using Xlib. I am have trouble figuring out the best way to do this. These are my ideas so far: Every second use _NET_ACTI...

I have created a video player in Gtk3 using Gstreamer in Python3. It works except when I add a GtkMenuBar (place 2). It will then either show a black screen, or fail with an exception. The exceptio...

I would like to create a semi transparent white window in XLib, but the window is not semi translucent, it remains fully opaque. I use the compton compositor and there are transparent windows in th...

I am trying to write a simple program that changes the name of a window with a certain window id. /* See LICENSE file for copyright and license details. */ #include <err.h> #include <std...

I am currently porting one of my applications from Xlib to libxcb and I am having a bit trouble finding informations on the XInput2 extension I use at some point. Is there an XInput2 implementation...

I need to draw a shape directly on screen (a little arrow) in X11, it serves as an overlay. I am searching for about an hour no with no good results. Could anyone provide me a good entry point for ...

im trying to write a C code to get the title of the Active Window in my Linux System, but the Function XFetchName always returnes zero, i also tried XGetWMName, same result... but using xprop, i ca...

I am drawing something on screen using XWindow Drawable, Pixmap, and XRender. I can see that sometimes there is flicker. Is there a way to wait for VBLANK? I googled a lot already, feels like looki...

I'm using the Xtst extentsion to type and do stuff using the mouse I have not encoutnered any problems untill I started using xtst to move and click the mouse. for example, here's a set of action:...

Currently I am in charge of developing a (C++) window class for a little project; the goal is to keep dependencies at a bare minimum. The implementation for Win32/WinAPI works as supposed, however,...

I have just started using Graphics in C, and I encountered this error while running a simple program that draws concentric circles: user@user:~/Documents/C$ gcc circle.c -lX11 -lgraph user@user:~/...

XGetImage takes 3-4 seconds to execute and completely freezes X11 Display *display; display = XOpenDisplay(NULL); if (!display) {fprintf(stderr, "unable to connect to display");return 7;} Window...

I want to find C / Xorg code to 'enter' a left mouse button click. I'd expect a single line of code but the only things I've found written in C are about two dozen lines long and they don't work an...

I'm writing an applicaiton for gentoo linux and redhat linux, one of the funciton always crashes on the redhat machine usleep(100000); Display *display; display = XOpenDisplay(NULL); Window w; ...

I am using XShm extension to draw and manipulate images in Linux. In order to not have screen flickering, I am passing send_event = TRUE to XShmPutImage and then waiting for the event with XIfEven...

I am trying to create a game loop for an xlib window, but I cannot manage to paint the window correctly. Right now I am creating a window with XCreateSimpleWindow(...), and using a for loop to pain...